Map array with empty argument

Question

I want to map array and get indexes in return (currentValue is not needed). I want to avoid using unused arguments, so is there better way to do this:

 array.map((el, index) => { // el is not used anywhere
          return (
          <div>X</div>
          );
        })

People often call the variable _ in that case.

CherryDT
– CherryDT

2021-08-22 18:50:22 +00:00
Commented Aug 22, 2021 at 18:50 — CherryDT
– CherryDT, Commented Aug 22, 2021 at 18:50
You're not using index, either.

Barmar
– Barmar

2021-08-22 18:51:43 +00:00
Commented Aug 22, 2021 at 18:51 — Barmar
– Barmar, Commented Aug 22, 2021 at 18:51
And you forgot the > at the end of </div

Barmar
– Barmar

2021-08-22 18:51:58 +00:00
Commented Aug 22, 2021 at 18:51 — Barmar
– Barmar, Commented Aug 22, 2021 at 18:51

Amir Meimari · Accepted Answer · 2021-08-22 18:53:32Z

3

If your want to use Array.map you can use _ as your value, this way you telling other developers that you don't plan to use that value. like:

someArray.map((_, index) => { /* your code */ })

Or your can simply use for loop.

answered Aug 22, 2021 at 18:53

Amir Meimari

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1 Comment

Greed94 Over a year ago

That's fine answer

Muhammad Mujtaba Shafique · Accepted Answer · 2021-08-22 22:14:14Z

-1

You have both options

Array.map(element, index)

As well as

Array.map(element)

edited Aug 22, 2021 at 22:14

answered Aug 22, 2021 at 20:39

Muhammad Mujtaba Shafique

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